Mechanism for polishing stone



(No Model.) 2 Sheets-Sheet 2.

W. H. B. PERRY.

MECHANISM FOR POLISHING STONE.

No. 425,628. Patented Apr. 15, 1890.

WITNEEEEE: I I IVENTEI lVILLIAM H. B. PERRY,

PATENT f OFFICE;

OF TROY, NEXV YORK.

MECHANISM FOR POLISHING STONE.

SPECIFICATION forming part of Letters Patent No. 425,628, dated April 15, 1890.

Application filed August 21, 1889.

I?) all whom it may concern:

Be it known that 1, WILLIAM H. B. PERRY, of the city of Troy, county of Rensselaer, State of New York, have invented new and useful Improvements in Machines for Polishing Stone, and of which the following is a specification.

My invention relates to that class of devices which are used for polishing granite, marble, and other kinds of stone; and my improvements have for their object to increase the efficiency of this class of apparatus.

My invention consists, as will be more fully detailed in connection with its illustration hereinafter, in the combination, with a polishing-disk of iron or other suitable material that is provided with the usual sand or polishing-material slits, and which disk has a central opening and a vertical shaft from which it is suspended and by which it is rotated, of a second polishing-disk that is also pro-' vided with the usual slits for distributing sand or polishing material, and which second disk is arranged to be in the same horizontal plane as the other disk and operated to rotate within the opening in the outer disk, with a direction of rotation that is opposite to that of the outer polishing-disk.

Accompanying this specification to form a part of it there are two plates of drawings containing three figures illustrating my invention, with the same designation of parts by letter-reference used in all of them.

Of the illustrations, Figure 1 is a side elevation of the mechanism containing my invention'. Fig. 2 is a central vertical section of the same, and Fig. 3 is a top view of the parts with the pulley and actuating-gears omitted and with the shaft and sleeve broken off just above where they connect with the rings on which they are hung.

The several parts of the apparatus thus illustrated are designated by letter-reference and the function of the parts is described as follows:

The letter D designates the outer polishing-disk, which has in it the usual verticallyarranged slits for distributing grinding or polishing material to the face of the stone being operated upon. This disk D is made to have a central opening 0 large enough for Serial No. 321,449. (No model.)

the movement therein of the other polishingdisk.

The letter D designates the other polishing-disk, which is arranged within the opening 0 made in the other disk, and so as to be in the same horizontal plane therewith. This polishing-disk D is likewise made with the usual slits s for supplying grinding or polishing material to the face of the stone being operated upon, and these disks are arranged to be operated as follows:

The letter P designates the driving-pulley,

which is operated by a belt. (Not shown.)

The letter S designates the main drivingshaft, which is arranged vertically in the bearings b b, with the pulley P connected to said shaft at its upper end.

The letter R designates a ring having vertical sides, and the letters H designate hangers that are attached to the lower end of the shaft and therefrom extended downwardly and outwardly and pivoted at their lower ends to the sides of the ring R, as indicated at p The letters ll designate hangers that are pivoted to said ring R at opposite sides thereof, as indicated at 13 and therefrom extended outwardly and downwardly to connect pivotally with. the central disk D at C, so that as said shaft is rotated the said disk D is also rotated and adapted to adjust on the surface of the stone with which its lower surface is in contact.

The letter G designates a beveled gear arranged on and so as to turn with the shaft S.

G is another beveled gear arranged on the shaft S, adapted to mesh into the gear G, so as to receive power therefrom.

The letter G designates still another beveled gear arranged on the sleeve S which latter encircles the shaft S, and this gear G receives power from the gear G to operate said sleeve The letters It designate hangers that are outwardly and downwardly projected from said sleeve S and at their lower ends'n are pivoted to the opposite side of the ring R and the letters 7t designate hangers that at their upper ends are pivoted at n to the said ring R and at their lower ends these hangers are connected to the disk D at it".

As thus arranged,by means of the geared connection made between the shaft S and the disks D and D the latter move with opposite rotation. The advantages produced by thus using two disks, as herein shown, instead of one is that the operation of grinding or polishing is made more uniform, and the grinding or polishing material is more uniformly supplied to the face of the stone being operated upon.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 15-- 1. In a mechanism for polishing stone, the combination, with the disk D, actuated to be rotated in a horizontal plane and provided with Vertical slits for distributing grinding or polishing agencies to the surface of the stone being operated upon, and having a central opening 0, of the disk D provided with slits for distributing grinding or polishing agencies to the face of the stone being operated upon, said disk D being arranged within D connected to the shaft S by the hangers H, ring R, and hangers H of the disk D, made with the opening 0 and connected to the sleeve S by the hangers h h and the ring R the gear-wheel G, arranged on the shaft S, the gear-wheel G arranged on the sleeve S and the intermediate gear G constructed and arranged to operate substantially in the manner as and for the purposes set forth.

Signed at Troy, New York, this 20th day of March, 1889, and in the presence of the two witnesses whose names are hereto written.

WILLIAM H. B. PERRY.

Witnesses:

CHARLES S. BRINTNALL, W. E. HAGAN. 

